Combined type-writing and computing machine.



F. A. HART.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

mwumcrma HLED ma. 6. 1912.

1,226,072. I amma M 15, 191?,

F. Ax HART.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED JAN-6.1912.

Patented May 15, 1917.

2 SHEETS-SHEET 2.

ATTORNEY WITNESSES:

UNITED STATES PATENT O FICE.

FREDERICK A. HART. OF JERSEY CITY. NEW JERSEY, AssmNo TO UNDERWOOD COM-PUTING MACHINE COMPANY. or NEW YORK. N. Y., A CORPORATION OF NEW YORK.

COMBINED TYPE-WRITING AND COMPUTING IVIACHINE.

To all lr/mm if may (once/'11,

lie it known that l. FHEDICIHCIY' A. HART, a citizen of the YlllttdStates. residing in Jersey City. in the countypf Hudson and State of'New Jersey. have invented certain new and useful lni'provements inCombined v T -'pe'-l\'riting and (oii'iputing Machines, of which thefollowing is a specification.-

, This invention relates to computing mm chines. such as illustrated inpatentto Han: son Xe. 905.4121. dated December 1, 1908, and its objectis to provide iiieans for -preventing faulty action of the computingmechanism. especially 'when the same is power driven at high speed. r

- 9 The improvements relate particularly to the mechanism whereby teenis' carried over from any computing wheel to the next higher wheel. Insaid patent, each computing wheel has a tooth which starts intooperation a tens-carrying. or carry-over, 'train; and subsequently apower driven set of'spurs completes the movements of all the carry-overtrains.

In some cases, especially in rapid o'peratioii thecarry-Over train isliable 'to- .be

- trains; and to prevent this. there is pro. vid'ed a locking edge llponeach of the The spurs also are-liable, under some .cir

cuinstances, especially when rapidly I rotated, to cause overthrow ofthe carry-over.

' spurs, which edge temporarily occupies a gap in the mutilated piiionwithwhichthe spur meshes, so that said pinion is posi .tivelyarrested, and hence cannot overthrow.

Other features and advantages will'her.e'-

inafter appear. I In the accompanying drawings,

Figure l is-a diagrammatic sectional side elevation ofa combinedtypewritingand 'cOmputingmaoliine of the Underwood- Hanson type, showingthe present improvemerits applied thereto; the parts being in;

normal positi0ns;

.Fig. 2 is at-perspective rear view of the lock which prevents'overthrowof the carryover trains when they are started into -bars 30, 31.

Specification of Letters Patent. Patented )Ia y 1 5, 1917,.

Application filed January 6, 1912. Serial No. 669,751. Y i

action, together with the mechanism Whereby thelock is withdrawn; theparts being in normal positions.

Fig. 3 is a sectional side elevation of thecon'i'puting wheels, tenscarrying trains, and spurs for driving the latter; the parts all innormal positions.

Fig. 4 is a sectional rear elevation of the parts seen. at .Fig. 3.

Fig. 5 is a view similar to Fig. 3, but showing the first lockwithdrawn;and the tens-carrying train as being rotated by its driving spur. I

Fig. (3 'is a View similar. to Fig. 5,'but showing the "movement. of thecarry-over train as having been completed by said spur; the latter.being still. in LHOtlOII, and.

the locking edge thereon occupying the adjacent gap inthe mutilatedpinion, whereby overthrow of said pinion is prevented- Fig. '7 shows theclutch for the spur shaft which drives'the carry-over trains.

Numeral keys 1 of the typ'ewriterdepress levers 2-t0 1b11t6 l38ll cranks3, to swing ter is driven by a spring-barrel 7,-and has a rack '8meshing with a pinion 9', connected to escapement wheel- 10,which iscontrolled by dogs 11; said dogs operatedby a uni Yersal bar which isdriven by heels 1.3 onthe'type bars. 'I y Said keys 1 have stemslitodepress arms type bars 411p to print against aplaten 5, \YlllCll lSmounted on a carriage- 6. The lat- 15 on rock shafts 16,'foriningpartsof linkages 17, which are depressed by said keys to engage anddepress CQlllPlltiltlOlTPlllS 18,

the latter suitably nrounted on bars 19.

These bars 19 are elevated one at a time,

through the instrumentality of a (lo- 20011 the carriage 6. saidjdogengaging jacks .21 one. after another, to depress. links 22. andvibrate'levers 23, which engage linkages 2T.

to raise'the reariends of said bars 19 sew atzm.

After the keys 1 have been depressed to print the desired number on theworksheet, theoperative pulls forwardly a handle 25, which is providedupon a rock sl'ia-t't' '26, the

latter extending across the inacliine,pand

having at its ends segments 27, which mesh with idle pinions '28,meshing with opposite racks 29, which form partsof the generaloperatorif said racks connected by cross "The forward movement of saidhandle carries the general operator forward, and cross-bar engages suchpins 18 as have been depressed by the keys, and drives for- -W.ard thebars 19 accordingly; said bars j having ontheir forward ends racks 32 tomesh Withp'inions 33, which are connected to dialwheels 3 4; the latterloosely mounted on an a-rbor 35.

The dial wheels are provided with teeth 36 for starting theirtens-carrying trains; and 'each tooth 36, once in each revolution of itswheel, engages one of the teeth in a pinion 37 to start thetens-carrying train, of which said pinion forms apart. This is donewhile the dial wheel 34: is moving 13pm 9 to 0; said tooth 36 movingfrom the dotted-line position to the full-line position at Fig. 3; andthe pinion 37 (which has'nine teeth) moving one-ninth of a revol utionto the Fig. 3 position.

Fixed to said pinion 37 is a three-toothed pinion 38, to mesh with agear 89 provided on the dial wheel 3i ofnext higher denomi- 113M011.Each tens-carrying t 'ain turns onethird of a revolution, at eachcomplete operation thereof; and hence has three normal positions, one.of which is seen at Fig. (3.

The operation of a tens-carrying train (after the latter has beenstarted by the tooth 36 during the forward stroke of the generaloperator29) is completed during the return stroke of said general operator, byone of a set of spurs forming in effect. gears *0, fixed upon atransverse shaft l1, which is driven from the rack 9 through anidlepinion l2, and a pinion 43 meshing therewith and mounted upon shaft 41.Pinion 43 has a clutch connection to said shaft, so as to revolve idlyduring the forward stroke of the general operator. but to make acompleterevolution of the shaft l1 during the return strokethereof. Theclutch connection comprises a ball 44 fitted in a pocket 5 in the shaft,and pressed by a spring 46 ;into a recess 47 in pinion t3; the ballconnecting the'pinionand shaft during the'return stroke of the pinion.but releasing the shaft during the initial stroke 'of the pinion.

The spurs l0 are placed in spiral or helical order along the. shaft 11,so as to operate the ten-carrying trains sc/v'uzz'm. When anytens-carrying train isin normal positioiQFig. (3. it is inoperable byits spur 4-0, since the pinion 37 is mutilated, every third tooth beingcut away. as at 48. to make a clearance for the spur 40. So long as atens-carrying train remains in normal position, the shaft 11 may revolveidly with respect thereto. .But when a train is started from the Fig. 6position to the Fig. 3 position, one of the uncut teeth of the pinion Imoves into the path of its spur 40, and the latter, therefore, at theensuing movement carrying train when. it is started by the tooth 36 onany dial or computing wheel, there is provided an intercepting or stopbar l9, normally in the path of one of the three teeth of pinion 38, asat Figs. 1, 2 and 2-5; this stop member being placed at such a point asto prevent the tens-carryii'ig train from moving substantially more thanoneninth of a revolution. This stop bar has slots or clearances 50 forthe computation racks In order to permit movement of the tensc'arryingtrains to be completed by the associated spur 40, a releasing connectionis made between said stop bar 49 and the spur shaft -11, and the bar ismade depressible, being arranged to slide down in guideways 51 in endplates of the computing head. Arms- 53, pivotally engaging openings orbearings 54 in said intercepting bar, are mounted upon a horizontal rockshaft 55; and fromone end of said shaft extends upwardly an arm 56,having at its top a tooth 57 normally seated in a notch 58 in a disk 59,fixed upon the normally stationary spur shaft 41. The leading edge ofthe notch is inclined to form a cam. and at the beginning of themovement of shaft *1, it acts upon the bevel tooth 57 to cam arm 56forwardly and the arms downwardly, to depress the bar 9 and the stopsthereon out of the paths of all the pinions 38. The bar remains in thisposition during the passage of the spurs 4 past the tens-carryingtrains; and at the latter part of the revolution of the shaft 41.springs 60 lift the bar 149 and snap the tooth 57 into the notch 58again. Hence the bar 49 is in position to prevent overthrow of anytens-carrying train ,at the starting movement thereof, but is withdrawnso as to permit the completion of the movement of all the tens-carryingtrains that. are started. In order to prevent overthrow of the tenscarrying trains'when they are revolved by the spurs 40, each spur isprovided with a locking mm or edge or broadened tooth 61, one of thesebeing shown in operat ve position at Fig. 6, in which it will be seenthat,

as soon as the spur 4O completes the rotation .iig' 'a- Genev'a lockwith said pinion. The spur. as will be seen, has two teeth, and thelower tooth may merge intosaid locking edge (31 'as illustrated. andsaid edge may be so long that it will remain in the path of thesucceeding pinion tooth until possibility of overthrow thereof iseliminated.

By reason of the provision of theselock ing devices against overthrow.it 'is also-'ren dered practicable to weakenthe springs 62 which connectthe detents 63 andGl for the gears 39 and 37 respectively. so that thecomputation wheels are operated more easily and quietly.

Variations may be resorted to within the scope of the invent-ion andportions of the improvements may be. used without others.

Having thus described my invention; I "claim:

l. The combination with 'compi'itation wheels. carry-over trains, saidwheels having teeth to start said carry-over trains, andgears tocomplete the movements of 'said carry-over trains. of stop devicesnormally in position to prevent overthrow of said early-over trains whenstarted by said wheels. and means for automatically with drawing saidstop devices during the operation of said gears.

2. The combinatiori with computation wheels. carry-over trains, saidwheels having teeth to start said carry-over trains, and gears tocomplete the movements of said carry-over trains,'of stop devicesnormally position to; prevent overthrow of said pcarry-over I trainswhen started by said wheels, a rotatable shaft on which saidgearsaremounted .an actuator on said shaft, and

means.to-enablesaid actuator to withdraw said stop devices.

3;The comb nation with computation wheels. carry-over trains, saidwheels having teeth. to start saidcarry-over trains. and

gears to complete the movements of saidcarry-over trains, of stopdevices normally in position to prevent overthrow of said carry-overtrains when started by said .wheels. a rotatable shaft on which saidgears are mounted. an actuator on said shaft, means to enable saidactuator to withdraw said stop devices, and 'a spring to restore saidstop devices to normal positions.

4. The combination with computation -wheels, carry-over trains, saidwheels having teeth to start said'ca rry-over trains.' and gears tocomplete themoveinents of said. carry-over trains. of a rotatable shaftcarry ing said gears. a stop bar in position to pre- 1 vent overthrow ofthe carry-over: trains when started by said wheels, a rock shaft havingan arm to withdraw said stop bar,-

a cam on said gear-shaft, a connection I from said cam to said rockshaft to withdraw said stop bar at the beginning of the rotation of thegear shaft, and a spring'de- I 'ing it when it is set.

vice to restore the bar and roclv' shaft to normal positions at theconclusion of the movement of said gear shaft.

- 5. The comh ination with wheels. carry-over trains-said wheels havingteeth to start said carry over trains. and gears to complete themovements of said earryrpver trains of means to prevent over.- throw ofthe caruv-over trains when started by said wheels. and means to releasesaid cairy-over trains for actuation by the gears brought into actionconcomitantly with the movement of said gears.

6. In a computing machine, the comhina tion with computing wheelsandnumeral keys. of computation members in which numbers are temporarilyset up by said keys.-

a separate device for running said numbers set up into said wheels acarry-over wheel for each computing wheel but normally disconnectedtherefrom, means on each com- PUUn-g wheel for giving its carry-overwheel.

a turn as it is moved by said separate device, a plate normallyeffective to prevent said turn from being excessive. and means formoving said plate to ineffective position.

7. In a computing machine. the comhinationwith computing wheels andnumeral keys, of computation members in which numbers are temporarilyset up by said keys, a separate device for running said numbers set upinto said wheels, a carry-over wheel for each computing wheel butnormally dising wheel for giving its'carry-over wheel a turn as it ismoved by said separate device in running in numbers. a plate normallyeffective to prevent said turn from being excessive. means for causingsaid separate device to give said turned. carry-over wheels anadditional turn after the computing wheels have been turned bysaid'device, and means for moving said plate to ineffective position by,said after-movement 'of said device.

8. In a computing inachme, the combination with a carry-over wheeladapted tobe set and later operated, of a stop for arrestand a stop forarresting it when it is operated.

move said plate to ineffective position during the rotation of saidshaft, but normally allowing said plate to lie in effective position.

' i 10. In a computing machine, the combinacomputation connectedtherefrom, means on each computcarryover wheel so that the remainingteeth in its mutilated gear will be engaged. by said shaft gears and thecarry-over wheel be turned thereby, means for arresting each carry-overwheel in its effective position. and means "for moving said arrestingmeans to ineii'ective position by the operation of said shaft.

11. In a computing machine the combination of a series of carry-overwheels with a series of computing wheels therefor, said carry-overwheels and said computing wheels being normally disengaged, a detent foreach carry-over wheel engaging it with a force sullicient only to holdit against displacement when disengaged from its computing wheel. atooth for each computing wheel for advancing its carr over wheel whilestill under the control of its detent and means for positively arrestingsaid carry-over wheel in correct position when so advanced.

12. In a computing machine the combination of a series of carry-overwheels with a series of computing wheels therefor, said carry-overwheels and said computing wheels being normally disengaged, a detent foreach carry-over wheel engaging it with a force sufiicient only to holditagainst displacement when disengaged from its computing wheel. a toothfor each computing wheel for advancing its carry-over wheel while stillunder the control of its detent, means for positively arresting saidcarryover wheel in correct position when so advanced, means for engagingthe advanced carry-over wheel and moving the same to turn saidcarry-over wheels against the force of said detent, means to preventoverthrow of said carry-over wheel when moved by said turning means andmeans brought into action upon movement of said turning means towithdraw the arresting means from said carry-over wheel so that they maybe turned to carry.

13. In a computing machine, the combination with an array of carry-overwheels, of an array of computing wheels with which they are associated,said carry-over wheels and said computing wheels being normallydisengaged, a light dctcnt for each carryover wheel normally holding itagainst displacemen a tooth on each computing wheel for advancing itscarry-over wheel while essors still under the control of itsdetent,means for positively "arresting said carry "cr wheel in correct positionwhen so advanced. a shaft adjacent said carry-over wheel, actuatingmeans on said shaft, arranged to engage. said carry-over wheels at theirad vanced positions and to turn said carry-over wheels, and lockingmeans on said shaft to hold its carry-over wheel locked when turned bysaidactuatin means.

14:. In a computing machine, the combination with computing wheels andcarr \"-over wheels, of two locks for said carr vover wheels, meansnormally tending to make one lock effective, means connected to theother lock to move the carryover wheels, and means for making the firstloch ii'ie'lliective by moving the second loci; to operate thecarry-over wheels and then lock them.

'15. In a computing machine, the combination with 'comi'iuting wheels.carry-over wheels for said con'iputing wheels which are preliminarilyset by said computing wheels and subsequently operated to carry, anarresting means for each carry ovcr wheel normally held in position toprevent overthrow of said wheel when preliminarily set, means tocomplete the turning of said carry-over wheels and a device moved bysaid turning means to move said lock to inei'lective position.

16. A computing machine having computing wheels and carry-over wheels.each of which may be set by its corresponding com-' puting wheel; andcomprising in combination a. lock for preventing the overthrow ofsaid'carry-over wheel when being set, and means for afterward completingthe turning of the carry-over wheel. I

17. A computing machine having computing wheels and, carry-over wheels.each of which may be set by its corresponding computing wheel; andcomprising in combination a lock for'preventing overthrow of saidcarryover wheel when being set, means forafterward completing-theturning of the carry-over wheel, and a lock for preventing overthrow ofsaid carry-over wheel when so turned, the turning of the carry-overwheels acting to withdraw the first lock and render the second lookactive.

18. A computing machine having computing wheels and carry-over wheels,each of which may be set by its corresponding computing wheel; andcomprising in combina tion a lock forpreventing overthrow of eachcarry-over Wheel when being set, means for positively moving said lockto ineffective position, and means for postively turning said carry-overwheel when said lock has been moved. to ii'icffective position.

19. A computing machine having computing wheels and carry-over wheels,each of which may be set by its corresponding computing wheel; andcomprising in come bination a lock for "preventing overthrow of eachcarry-over wheel when being set, means lock for preventing overthrow ofsaid carryover wheel when so turned, brought into action by said movingmeans.

20. In a computing'machine, the combination with computing wheels-01"members in which numbers are temporarily set up, carry-over wheels, andmeans whereby said carry-over wheels are driven both directly andthrough the computing wheels, said driving means including deviceswhereby the carry-over wheels are locked against over-throw during thedriving action.

21. In a computing machine, the combination with a device in whichnumbers are temporarily set :up, .of computing wheels, means forcarrying the-numbers so set up into said computlng wheels, carry-overwheels, means for driving said carry-over I wheels, and two kinds oflocks for preventing overthrow of said carry-over wheels, brought intoaction at different times by said driving'means.

22. The combination with computing wheels and carry-over trains; detentsfor yieldingly holding said trains normallyineifeotive; said wheelshaving teeth. to start said carry-over trains teeth forming part of saidtrains to cooperate with said detents, driven gears also cooperatingwith said teeth position.

to complete the movement of said carry-over trains against the action ofsaid detents and to cooperate with said detents in preventing saidtrains from overthrow after movement by said gears.

23. In a computing machine, the combination with computing whee s andcarry over wheels therefor, which carry-over wheels are preliminarilyset by said computing wheels and afterward operated to carry, drivingmeans for said computing wheels and said carry-over wheels, means forinterposing a stop so that said carry-over wheels are not overthrownduring the preliminarv,

setting thereof by said computing wheels and means for positivelyarresting said carry-over wheels when completely operated by saiddrivingmeans. Y

24:. The combination with a carry-over wheel, and means for setting fromineffective to effective position, of means for preventing overthrow ofsaid wheel when so set, an assisting segment for engaging theset'carryover wheel and including an arm having a driving spur and a camfixed to move with said spur and having a definite relative positionwith respect thereto and means operated by said cam for moving saidoverthrow preventing means to inefiective FREDERICK A. HART. Witnesses:

K. FRANKFORT,

. C. RIPLEY.

